Crude birth rate is all the time reported per 1000 living
people.
To compute for this, the formula is number of births x 1000
divided by the estimated population at midyear. So plugging in the values
given:
14,662 x 1000 divided by 994,948
= 14662000 / 994948
= 14.68 per 1000 living people.
n(A-B) denotes elements which are in A but not in B
n(Au B) denotes elements in A and B
n(AnB) denotes elements that are common in A and B
Now I will add one more set
n(B-A) which denotes elements in B but not in A
So, n(AuB) = n(A-B) + n( B-A) +n(AnB)
70 = 18 +n(B-A) + 25
70 = 43 + n(B-A)
n(B-A) = 70-43
n(B-A) = 27
So, n(B) = n( B-A) + n( AnB)
= 27+25
= 52
